煤系地层对地下水及土壤的影响分析

为研究煤系地层内地下水、土壤元素含量特征以及质量状况，通过对研究区地下水及土壤化学成分进行了分析及质量评价。结果表明，地下水水化学类型以SO42--Ca?Mg和HCO3--Ca为主，微量元素含量最高的为Mn，平均值为4.92 mg/L；其次为Zn，平均值为0.47 mg/L；含量最少的为Cu，平均值为0.03 mg/L；pH平均值为5.00，属于酸性水；溶解性总固体(TDS)、总硬度(HB)、溶解氧(COD)平均值分别为1011.44 mg/L、659.65 mg/L、8.33 mg/L。土壤微量元素含量最高的为Cr，平均值为148.00 mg/kg，其次为Zn，平均值为107.76 mg/kg，含量最少的为Cd，平均值为0.43 mg/kg。质量评价表明地下水硫酸盐、Mn、Cr、Ni、pH、HB、TDS、COD均超标，综合质量级别为Ⅴ级。土壤污染超标元素为Cu、Cd、Ni，内梅罗综合指数为1.35，质量级别为中等。

Influence Analysis of Groundwater and Soil in Coalstrata

In order to discuss the element content and quality of groundwater and soil in coalstrata,chemical composition of groundwater and soil were analyzed and evaluated.The results showed that： water chemistry type of groundwater were most SO42--Ca·Mg and HCO3--Ca,in trace elements,contents of Mn was highest and its average was 4.92 mg/L;next was Zn and its average was 0.47 mg/L;the content of Cu was least and its average was 0.03 mg/L;pH of groundwater was 5.00 and belonged to acid water;average of TDS,HB,COD were 1011.44,659.65,8.33 mg/L.In trace elements of soil,the content of Cr was highest and its average was 148.00 mg/kg,next was Zn and its average was 107.76 mg/kg,the content of Cd was the least and its average was 0.43 mg/kg.Quality evaluation was showed： SO42-,Mn,Cr,Ni,pH,HB,TDS,COD were exceeded standard,comprehensive quality level was level of Ⅴ.Contents of Cu,Cd,Ni were all exceed standard,comprehensive index was 1.35 and comprehensive quality level were medium.